Drum construction



A ril 27',1926.- 1,582,489

R M. SNELL DRUM CONSTRUCTION Filed Feb. 7, 1925 ATTORNEYS.

Patented Apr. 27, 1926..

UNITED STATES PATENT OFFICE.

RALPH M. SNELL, OF NORTH AGAWAM, MASSACHUSETTS, ASSIGNOR TO PAPER MAKERS CHEMICAL COMPANY, OF'WILLIMANSETT, MASSACHUSETTS, 'A GOR- PORATION OF NEW JERSEY.

' DRUM CONSTRUCTION.

Application fired February 7, 1925. Serial No. 7,690.

To all whom it may concern:

Be it known that I, RALPH M. SNELL, a citizen of the United States, residing at North Agawam, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Drum.Con"- structions, of which the following is a specification. I

This invention relates to improvements in he construction of drums or containers-and relates more particularly to improvements in the method of securing the head members therein.

The invention is capable of broad application wherever it is desired to secure thehead within a drum or other similar container, but will be disclosed in the embodiment at present preferred in connection with drums having walls of laminated material such as paper or other fibrous material. Such drums are. peculiarly adapted for usein connection with the storage and transportation of certain chemicals since the material 1 may be treated with certain liquids to render the material impervious to said chemicals.

Considerable ditficulty, however, has been experienced heretofore in overcoming leakage ,between the walls of the drum and head, which I'overcome according to my invention by providing a structure in which .the head and drum are securely'held in interlocked relation so as to provide a nonleakable joint therebetween and which is accomplished by a novel combination and arrangement of parts hereinafter to be more fully disclosed, reference being had to the accompanying drawinq, in which:

Tig. 1 is a side elevational view of a drum embodying the novel features of my invention;

Fig. 2 is a plan view of the same;

' Fig. 3 is an enlarged sectional view showingi the principal features of the mventionE an Figs. 4 and 5 are similar views showing a modification thereof.

Referring to the drawings in detail, a drum 1 is shown that may be in the form of a cylinder, the walls 2 of which are preferably made of laminated'material such as laye'rs of paper or the like properly bonded together. Such material may be easily pressed together so as to form a rigid and strong drum structure but in lieu of the laminated material referred to, it may be desirable under certain circumstances in the practice of my invention to form the drum of metal or wood, either of which will lend itself readily to the practice of my invention.

A circumferential sealing rib 3 is provided on the interior of the wall of the drum and adjacent the end thereof that is adapted to interfit or interlock with a groove 4 extend ing around the side edge of a head H member, as shown. The head may be of wood, pressed metal or other material a's-.may be desired and is preferably formed to have a beveled or tapering wedging surface 0 below the groove 4, as shown.

The walls 2 of the drum are slightly ex pansible in an outward direction and as the head H is pressed into the drum, the bevelled or tapering portion C of the head is adapted to engage the circumferential rib 3 of the drum and by a wedgingaction expand the walls sufficiently to allow the rib and groove of the drum and head to become interlocked or interengaged.

The walls of the drum tend to contract about the head after the head has been pressed into place, but to prevent an outward yielding or expanding movement of the walls after the head is inserted therein. I provide a ring-like member 5 havinga U- shaped cross se ction comprising parallel side walls intergral with an end walladapted to fit over and snugly embrace opposite sides' of the wall of the drum. The outer wall of the ring is provided with a circumferential depression or groove 6 forming an inwardly extending rib. 7 on its inner face that is adapted to interfit'witha groove 8 provided in the wall 2 of the drum and extending circumferentially thereabout. I

Theinner wall of the ring is preferably curved inwardly at the lower side thereof, as

shown. and is adapted to function as a stop for the head to prevent an outward movementof said head. The ringis placed over the wall of the drum after the head has been located therein and is held in, place by the- -interfitting rib and groove and, as will-be seen, functions to reinforce the end walls of the drum and to retain the head in place.

A clamping hoop or ring R is provided that encircles the ring 5 in the groove thereof and may be tightened therea'round by any suitable means so as" to firmly embrace and 2 nasaso contract the ring and drum walls so that the head may be securely clamped within the drum to provide a non-leakable joint between the rib 3 and groove 4 of the head and drum. The ring R is preferably secured in place by welding its ends together whereby it will be retained as a substantially rigid clamping member adapted to prevent an expansion of the walls of the drum with respect to the head.

It may be desirable under certain conditions to provide a metallic lining L for the drum, as shown in Fig. 4, in which case the lining may be provided with a depression or groove 11 therearound that will interfit with the rib 3 of the drum and the groove 4 of the head. A ring 5' similar to the one already described may be employed as before to reinforce the wall 2 of the drum, while a hoop ring R within the groove thereof may, as before described, securely bind the parts together and prevent anexpansion of the walls of the drum with respect to the head H.

Another modified form of the invention is shown in Fig. 5, in which the wall 2" and the drum h, are formed for interlocking en agement as previously described, while t e ring 5 is formed so that the innor wall thereof is disposed at an angle with respect to the outer wall, whereby the peripheral edge of said wall is adapted to abut the head at a distance from the circumfer ential edge thereof. This'form of the in vention may be desirable where it is desired to provide a stop for the head at a point remote from the periphery thereof.

From the foregoing, it will be seen that I have provided a structure in which the head and drum are held in interlocking and non-leakable relation by means that also serve to stiffen or reinforce the walls of the drum.

I am aware that many changes may be made in the form of the inventlon without departing from the scope thereof, and I prefer, therefore, to be limited by the appended claims rather than by the foregoing description.

What I claim is:

1. The combination in a container of a shell having a groove around its outer wall and a rib on its inner wall, said groove and rib being substantially in the same plane, a head having a peripheral groove for engaging with said rib, a reinforcing ring embracing the Walls at'the end of the shell having a portion for abutting the outer side of said head to hold the head in place and being provided with a groove in thevouter wall thereof to form a I'll): for engaging the groove of the drum to hold the ring in place and a clamping ri'ng embracing the reinforcing ring and disposed within the groove thereof for holding the drum, head and reinforcing ring in interengaged relation.

2. The combination in a container of a shell having a rib and a roove on its inner and outer walls respectively, said groove and rib bein substantially in the same plane, a head having a groove about its periphery to receive the rib of the drum, a reinforcing ring having parallel outer and inner walls for embracing the inner and outer walls of the shell at the end thereof, the outer wall of said ring being provided with a groove and a rib for engaging with the groove of the shell and the inner wall of said ring being arranged to abut the outer face of the head, a clamping ring disposed within the groove of said reinforcing ring for holding the rib of said ring within the groove of the shell, whereby said reinforc ing ring will hold the head in engagement with the interior of said shell.

3. The combination in a container of a shell having a rib on its inner wall and a groove in its outer wall, said rib and groove being substantially in the same plane, a head having a peripheral groove for engaging with said rib and being provided with '1 tapering surface below said groove for engagin said rib to expand said shell as the head is inserted therein, a reinforcing ring embracing the end of the shell having a portion for abuttin the outer side of said head and being provided with a groove in the outer wall thereof to form a rib for engaging with the groove of the drum and a clamping ring embracing the ring in the groove thereof for holding the said rein forcing ring, head and drum in intercugaged relation.

4. A container comprising in combination, a cylindrical shell, a head within said shell adjacent the end thereof, said head and shell being provided with an interfitting groove and rib, said groove and rib being substantially in thesame plane, a reinforcing rin having outer and inner walls for embracing outer and inner walls of said shell arranged so that its inner wail abuts the outer face of said head to holl the same in interengaged position with the shell, the outer wall of said shell and ring being provided with an interfitting rib and groove to hold the ring in place on said' shell, a clamping ring embracing the said reinforcing ring about the outer wall thereof and adapted to hold the ribs and grooves of the reinforcing ring shell and head in engagement.

In testimony whereof I have affixed my signature.

RALPH M. SNELL. 

